כִּ֣י אִם־שָׁמֹ֤עַ תִּשְׁמַע֙ בְּקֹל֔וֹ וְעָשִׂ֕יתָ כֹּ֖ל אֲשֶׁ֣ר אֲדַבֵּ֑ר וְאָֽיַבְתִּי֙ אֶת־אֹ֣יְבֶ֔יךָ וְצַרְתִּ֖י אֶת־צֹרְרֶֽיךָ׃
But if thou shalt indeed hearken unto his voice, and do all that I speak; then I will be an enemy unto thine enemies, and an adversary unto thine adversaries.
Read kabbalistic (mystical) interpretation of Exodus 23:22: and classical mystical sources.